Merge pull request #5 from phaller/wip-match

Support await inside match expressions

1 files changed, 73 insertions, 0 deletions

diff --git a/src/test/scala/scala/async/run/match0/Match0.scala b/src/test/scala/scala/async/run/match0/Match0.scala
new file mode 100644
index 0000000..3c7e297
--- /dev/null
+++ b/src/test/scala/scala/async/run/match0/Match0.scala
@@ -0,0 +1,73 @@
+/**
+ * Copyright (C) 2012 Typesafe Inc. <http://www.typesafe.com>
+ */
+
+package scala.async
+package run
+package match0
+
+import language.{reflectiveCalls, postfixOps}
+import scala.concurrent.{Future, ExecutionContext, future, Await}
+import scala.concurrent.duration._
+import scala.async.Async.{async, await}
+import org.junit.runner.RunWith
+import org.junit.runners.JUnit4
+import org.junit.Test
+
+
+class TestMatchClass {
+
+  import ExecutionContext.Implicits.global
+
+  def m1(x: Int): Future[Int] = future {
+    Thread.sleep(1000)
+    x + 2
+  }
+
+  def m2(y: Int): Future[Int] = async {
+    val f = m1(y)
+    var z = 0
+    y match {
+      case 10 =>
+        val x1 = await(f)
+        z = x1 + 2
+      case 20 =>
+        val x2 = await(f)
+        z = x2 - 2
+    }
+    z
+  }
+
+  def m3(y: Int): Future[Int] = async {
+    val f = m1(y)
+    var z = 0
+    y match {
+      case 0 =>
+        val x2 = await(f)
+        z = x2 - 2
+      case 1 =>
+        val x1 = await(f)
+        z = x1 + 2
+    }
+    z
+  }
+}
+
+
+@RunWith(classOf[JUnit4])
+class MatchSpec {
+
+  @Test def `support await in a simple match expression`() {
+    val o = new TestMatchClass
+    val fut = o.m2(10) // matches first case
+    val res = Await.result(fut, 2 seconds)
+    res mustBe (14)
+  }
+
+  @Test def `support await in a simple match expression 2`() {
+    val o = new TestMatchClass
+    val fut = o.m3(1) // matches second case
+    val res = Await.result(fut, 2 seconds)
+    res mustBe (5)
+  }
+}